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I have been making USB keyboard conversions for a while now, and I have had lots of requests for a kits to convert computers, so here it is.

This kit will allow you to convert a 1980s Sinclair ZX Spectrum 48K rubber key model to work as a fully functional USB keyboard.

The kit is comprised of a replacement keyboard membrane, and USB controller board. The original computer board and keyboard membrane are carefully removed and the replacement parts fitted.

There is a choice of either a micro USB connector to plug in a normal micro USB lead, or a 4 pin header if you wish to fit a captive USB lead, or connect to something like a Raspberry Pi or similar mounted inside.

The Spectrum has 40 rubber keys, but through use of 'Caps Shift' and 'Symbol Shift' keys, I have mapped most of the main keys you would need.

Two modes are available, the default is to map they keys to whatever is printed on the Spectrum keys. The alternative is direct mapping where each key press is passed directly to the PC, which is better for emulators, or if you want to remap the keys in software. The button on the back is used to change between modes. Alternatively, it can be fixed at direct or remapped mode, if you prefer.

I've also added a click sound when a key is pressed. The original Spectrum did this, and it does make it easier to type. This is disabled in the direct mode as the emulators also makes the click sound.

Note: a ZX Spectrum is not included. You need to supply your own. Please make sure it is a broken one, or the useful parts are passed on to someone who can make use of them.

ZX Spectrum USB Keyboard Conversion kit

VAT included (where applicable). 


  • Handmade Supply
  • Material: Microcontroller
  • Made to order
  • Ships worldwide from United Kingdom
  • Feedback: 39 reviews
  • Favourited by: 28 people